1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lerok [7]
3 years ago
13

80 is 25 percent of what number

Mathematics
1 answer:
IgorLugansk [536]3 years ago
8 0
<span>So we want to know the number from which we take 25% and get 80. If the number we are looking for is x, then the equation to find that x would be: (25/100)*x=80 which says twenty five percent out of x is equal 80. So, x=(80*100)/25. And finally, x= 8000/25=320. So, 25% out of 320 is 80.</span>
You might be interested in
What is a differential equation
pickupchik [31]
A differential equation is one that contains the derivative of a function.  For example f(x) + 3 = 4f'(x) - 2.  Usually you will be given one of the functions and initial conditions if you have to solve.
5 0
3 years ago
Solve the following equation x+2=10
Maru [420]

Answer:

x=8

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Ayudaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Nady [450]

Answer:

Okay, hello to you too.

5 0
2 years ago
Read 2 more answers
A piggy bank contains pennies, nickels, and dimes. The number of dimes is 15 more than the number of nickels, and there are 140
amm1812

Answer:

Option D is correct.

There are 34 nickels in the piggy bank.

Step-by-step explanation:

A piggy bank contains pennies, nickels and dimes.

Let the number of pennies be p

Let the number of nickels be n

Let the number of dimes be d

Also, note that 1 penny = $0.01

1 nickel = $0.05

1 dime = $0.10

- The number of dimes is 15 more than the number of nickels.

d = 15 + n

- There are 140 coins altogether totaling $7.17.

p + n + d = 140

0.01p + 0.05n + 0.1d = 7.17

Bringing the 3 equations together

d = 15 + n (eqn 1)

p + n + d = 140 (eqn 2)

0.01p + 0.05n + 0.1d = 7.17 (eqn 3)

Substitute (eqn 1) into (eqn 2)

p + n + d = 140

p + n + (15 + n) = 140

p + 2n + 15 = 140

p = 140 - 15 - 2n = 125 - 2n

p = 125 - 2n (eqn 4)

Substitute (eqn 1) and (eqn 4) into (eqn 3)

0.01p + 0.05n + 0.1d = 7.17

0.01(125 - 2n) + 0.05n + 0.1(15 + n) = 71.7

1.25 - 0.02n + 0.05n + 1.5 + 0.1n = 7.17

0.1n + 0.05n - 0.02n + 1.5 + 1.25 = 7.17

0.13n + 2.75 = 7.17

0.13n = 7.17 - 2.75 = 4.42

0.13n = 4.42

n = (4.42/0.13) = 34

d = 15 + n = 15 + 34 = 49

p = 125 -2n = 125 - (2×34) = 125 - 68 = 57

Hence, there are 57 pennies, 34 nickels and 49 dimes in the piggy bank.

Hope this Helps!!!

7 0
3 years ago
Helpp Its for calculus
Troyanec [42]

Answer:

its 18

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Other questions:
  • If i make 10 fruit baskets and want to sell them for $35 each 10=35x what's my answer
    8·1 answer
  • Help two helpless triangles?
    9·2 answers
  • What are the LDC between 4/9 &amp; 2/3
    15·1 answer
  • 1.
    6·1 answer
  • If two marbles are selected in succession with replacement, find the probability that both marble is blue.
    7·1 answer
  • Divide. Write your answer as a fraction or mixed number in simplest form.<br><br> 9 1/3 • 7
    5·1 answer
  • Which set of real numbers contains 23 and .45?
    7·1 answer
  • If a1=4 and an =2an-1 – 1 then find the value of a4.
    10·1 answer
  • To the nearest​ millimeter, a cell phone is 105 mm long and 66 mm wide. What is the ratio of the width to the​ length?
    11·2 answers
  • Write an equation that represents the line.<br> Use exact numbers.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!